This is what GooglePlay advises publishers who get pirated copies of their books taken down:

This message is to inform you that the book you reported, “TITLE”, provided by PIRATE, has been removed from Google Play and should no longer be available for sale within approximately 48 hours.

You have the choice to allow customers to keep copies they already purchased. Alternatively, you may choose to revoke customers’ access to the book. We urge you to consider allowing customers to keep copies already purchased because, in our experience, revoking access creates a poor user experience.

Right. How about the poor publisher experience? That’s right, no one cares. Yay.